I'm using Firefox (current version) on Windows XP.
Unfortunately, after a a longer "internet research session" Firefox is not responding any more and its windows are not really displayed any more.
I ...

I would like to open 10 Firefox profile windows simultaneously on Ubuntu desktop. I know how to do this on Windows but the application doesn't exist on Ubuntu. I have tried Profile Manager in Terminal ...

I've used firefox since version 1 and I've accumulated a lot of bookmarks. And now, thanks to buggy syncs over the years, I've got millions of 'em inc. duplicates!
What's most useful to me is Recent ...

After having had Flash installed and blocked with NoScript for the last few years (except on a enable-per-use base), I have recently -- a month or so ago -- grown tired of the frequent security issues ...

I am using GNU Icecat (GNU version of Mozilla Firefox) on Trisquel GNU/Linux. In order to minimize/optimize data usage while web surfing, I want to use google data compression proxy.
So, How do I use ...

A website that I visit often has changed its domain name (old.example.com -> new.example.com). How can I easily rewrite all entries in Firefox's history and sessions (active tabs), as if the website ...

Some websites which seems to be designed with "responsive" templates are displaying in Firefox with the content off the right side of the viewing area. The issue happens in Firefox Safe Mode and at ...

When we begin to write a website address in Firefox, it automatically shows a few possible website addresses, but it will not show all other website addresses.
I want to look at all those addresses ...

This may sound like superstition. But I observed for quite some time that when downloading a relatively large file with Firefox (as of 38.05), the reported download speed is higher when the progress ...

This may be a bit pedantic, but I like to see my full download history, and see the progress of my current downloads in a larger format than the tiny arrow on firefox's navigation/search bar. I have ...

I have a local server serving HTTPS using a self-signed certificate. It does not serve http. The certificate is issued with cn=host1.subdomain1.domain1. The server is reachable under name host2, too.
...

I'm using Pale Moon (25.5.0 x86) but apparently tweaks that use the userChrome.css file are the same as in Firefox.
I tried to remove them using the DOM Inspector, but I couldn't.
I found this post ...

I find that a lot of the webm videos (or gifv) on imgur and the like are too small to see (yes, my eyesight is horrible). These types of videos allow for viewing in full screen, but since the source ...

Long story short there are webpages and videos I want to display on my secondary monitor while browsing on my main monitor. All of my toolbars and tabs make the browser rather bulky, and I'd like to ...

Internet Explorer has a Local intranet security zone and local file(file:///c:/xxx.htm) has more privileges than a page in Internet security zone(http://www.example.com).
Will local pages in Chrome ...

I just found that I have a new plug-in called RocketLife Secure Plug-In Layer(Ver. 1.0.5.0):
I do not know how it got into my browser.
It says that it is related to Photo, a program which is related ...

I really don't get the policy of not allowing java applets in browser. I mean, I understand that the java does not run automatically for security reasons, but it seems that there is actually no way ...

When I try to open a webpage, I get an ssl_error_weak_server_ephemeral_dh_key error in Firefox.
According to my googling the keys are weak, there is a security hole, I'm not safe, etc. Great, Firefox ...